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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0c8d4087c8a9283f5b9ca0b12958ebce4295341250ce5bb2919be1011e3c7479' 
  AND token = 'upxmDgDe1HT3q/O7EoJi7KX9QcVHwAWAyz4/ZDmVc7A=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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