Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '59d86a17ec83585746240c4e3dfe300a0ac16696606ff8522ca5c7608ef4e964' 
  AND token = '2AWdPzpv8WKZF+/OC04C3yiA8ZVi4tQ2DwiEeIx/JHY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00033

JSON explain

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