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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '6df3c0e9dae7fc9dc8a79ad0332a8d9ea0ad1f4ef80639af0b2d22394449b5dc' 
  AND token = '/JXEskzTmGfrcisJMs2RAILv8pGwB23b76kVe6P7/rA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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