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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f86c1bebbe9882061ac401cf3504267ab543325f28dac0adf8016d96f5d10354' 
  AND token = 'U0RxpkZcZ8anR4MnIBzhHYg2Vd/Us5S3EdATajakpUk=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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