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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0960d4ad865f961d77f599230e74f0e71701cbfea0369305f6e2bca75bb8da7d' 
  AND token = 'cVR8sfKvGiQeWzT/eqSiJD45XZVS26Y5IA7Zr7oGasE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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