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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '224744aecf244cd8ddbd45b99bd3d9f92ee6d7893f92c6b9e2c8e6eba564788e' 
  AND token = 'JT9m7WleCjXLq9VB6f3M/9srOpA0+ledS/KWfg+gq20=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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