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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '487f5436c1e19be588444516622653150a35d0b0dcd79ecd37e4f5c550574bef' 
  AND token = '14sb4+hVR3nfQXKwx/TF80YrXMJuZOq3ucTM/zQKdf4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00020

JSON explain

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