Sandbox

SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = 'e83157fb32e1c84a53940d3b6e37015729e00053eace5863dc46e60f5e69dcee' 
  AND token = 'CJXl716secWoBAZ4YuWnMsGGEN82rwEBIYvRjsvZ2M0=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00034

JSON explain

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