Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '74b783868f05fa6e4ef3ddef17fa33f40b3e29e751310161dd2f651548572f01' 
  AND token = '5HJEd6ePk+rovuQPTRSBeuUPITmIZcRL90oRbUI9tRE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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