Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'cd5308e2a520a1c93a849251c34b0e4b53c2a9697eb971ed43854bdfa6b0ba59' 
  AND token = 'cAxyuaobKi8uxZ7VQZs7QD/8rL8ipoS7NUTYHzr7wbQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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