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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'c1b184668c982cf299d9769dd813c118f48b1e210b91333ba4fc0add6eca0107' 
  AND token = 'UWZIfqz89tEyaYprdlZ7eDWH1JlX4Nw//Xvc/jDMrOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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