Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'd3c795adc4b70ab3517e214a3bc5d46fe7791ae34966e4cc885b15d2a4b4187e' 
  AND token = '1vrZoZzpynuf1HbfQZpANInPYNNytMs1nLVofn5FPiQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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