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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0eed11dac7c57f01bae5dee089ac6d3f0049af4283df7b1d7d29df9a011ed3ab' 
  AND token = 'LhHanmjeMLyb/4ELaIq/JUXZolOmJk/QfSnKIg7f8TE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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