Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '233f90ceb54f3a0a413b474a032c594cf2d34ce4e91eb4a0a6a699c3e5874722' 
  AND token = '1Ii1jYvlCuLxRM/8vLb0hAgOsr8A/Q6LZqfId3jWavo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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