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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cc3c114d454edfdfdd4ba6272e422d945fd30a12decd490fdd278ef49fb058e1' 
  AND token = '72p505bCQWtyQFrY+htEzUqElroe0GarDe8/hvMakc8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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