Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '37d955c00cf55ac279a4cda8d0fedc083cd19acb5e5dc8b9b7ec5ee8fedc4d6e' 
  AND token = 'ybwL1EXp61lyWvfZIr5mnmLBFhWuO4bZZrJwnmr4zPc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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