SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '34e8044e464c6166777a4dc9f67f56bf588b085031939b229f91b3c28c767a3c' 
  AND token = 'ajsndPfIL4tYUgKAXRrC7g7tzSlPw6cGW7S/yFvamEg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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