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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd188f6c090940183227a20d9fd058a8133de27d80d350d2d27d76e718dd518c0' 
  AND token = 'Lp5jD3Nmf5MG01c4I89cR4Ac++UH8cBH9PvsNTi1UD4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00045

JSON explain

{
  "query_block": {
    "select_id": 1,
    "message": "no matching row in const table"
  }
}