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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0022ce318c4bea2dcdeee6128e2fc1f76268228465b8fef864f18c17552496e6' 
  AND token = 'DjBCZCduFi6+yjBpj9zBtLzej1ly3QhSVtfe0GmLi9M=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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