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SELECT 
  1 
FROM 
  cscart_multi_declock_keys 
WHERE 
  key_id = 'e1494bd4cc5eaa7d1ae04d4bdd288a445a601649aa8ed2d7cbe987ce6514f0a3' 
  AND token = 'PxE8nmUxp4ZQ/km9LqCQEllYm7ey8MYKRIIrw/lhKyQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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