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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '58658b65aa0fdb4630d5130de8742ee39ab7c5617c59b5fe767d5d5ccae46060' 
  AND token = 'zaSF6AncZdeDPKE/Qqtt/66rRv0sceic8O7m3UkHUMI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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