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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e92174369923449eb89c1b7e67f0eea2b54f04b3e3716834d0fb86bc32eab2c5' 
  AND token = 'REyiItvJq0mW6fxeh0Ab6QF9OhtZzWo9e7YBaaC0cAE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00027

JSON explain

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