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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f3bb0cf2e7ee8f33eaa9e911c1eec670020daa7376e7b91460135854bf631c04' 
  AND token = 'gImJng9IPkfRWcbrdvkU1pFZFYIL7NZoI/L2Xfl5R7o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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