Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1a5dc8e45a6f726952049a17baa26c5da8307dc89bb61a85f80f74bc0f29ded9' 
  AND token = 'mOp21dkg1A9vRv67aDXARFozYsKMAk64baL2a1AbNBo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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