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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cb584e57733321939408e9890d8c7448789614a32ddf11cb6b1c7f47c54650fc' 
  AND token = 'dqj6/o6HrYg7t4VfCusJ/5kZ79SD4B8Ssv75NxrWnz8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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