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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ebcebc92917effe29461379b77c8e8b7164ed4761be833f3450bccd2660ba450' 
  AND token = '+j+luv7eqAdog7YKQnsFL3eg5DVeSqs/yEiaI63ZlEc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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