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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c79a6d165f059b618fe728a22f3014cabc0e9ab68caa6cc3ee71f6cec396c953' 
  AND token = 'X1rZgHX+wq8e3JEYAXG64ePYZgBJwOsQ7VuX8VUU9OA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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