Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1d25c1ff7e66005e32bc9601caf583b92fe3d9c43807a1c2a177107c5793d4e4' 
  AND token = '4+YiYC3mSP63K47eniodOQfPDYSvsIt34Wrmq8bSiaE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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