Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'b7fd66ba05c83eb07dd9ac671d7d3ac0d4c0d07facb8bd26f08ee0caabad759d' 
  AND token = 'JZavgGP6ZEpSIKo46EHsjMRcHND41asfwnvYYcWe/pM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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