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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '963b8b1807d8be5a9fa4f0b8dcca0b4a361a202c9933842fc896080416dc0819' 
  AND token = '2K3NUxBI4rUYI22rWzP/lot9Yobh7Ans3ItrdfHVGgg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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