Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c5b75adda9c9e9236f5a8380d2f2d08881958cd2d0da40a95cf6edb634fc4121' 
  AND token = '1OPJoZUThpMAvVfhI0X3J151Ufa+if1vb/ew3aD0Pa0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00025

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}