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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '70fa32d1ab8d07e878952901f05f6e541e0862fec73399ae70316e109d45af4b' 
  AND token = '0QWZNLX/3oAHrKH4lMSV0yo3zMy5seuTv9L7mpZwENw=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00018

JSON explain

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