Sandbox

SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f11beafb763288ac1d3be24fcb29420d0d8dc6b80e4fbb0918a8d28e2e4d97ea' 
  AND token = 'OSVLEYlzJY1O3e+374dFNW14Gs3UDEbVe4XQUAv2FgA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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