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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ee61adcdb3803e4e6448c16076492416aefc5cc5d16152bb62e4400002310fc9' 
  AND token = 'XTEs5EiwYRc3NmCSEYoGSRNPNm5K85A4j0Ct/14Fg0s=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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