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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '92266d60b9d86901f06c5588e349ebd5a657ade25f483c1c64b4b8495bf7320d' 
  AND token = 'pZFLi9m0aGly09nk+SVL+/6nCp/Zv4SDVWAnJfIg4+c=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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