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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '850ed429ff58934402a447c253bb2dbf1564135cc025e9f6095ddad9dc300a1f' 
  AND token = 'pJuCxB0Ioovp6GRRV4TJ1yqf1jE48fQ1e/0xZgI2hlE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00017

JSON explain

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