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SELECT 
  1 
FROM 
  cscart_june_setuplock_keys 
WHERE 
  key_id = '919d63a196b24fcf8edafce66a16d016f05203e87adb47bfd9fdb5a049144ff0' 
  AND token = 'D9hgAAH888225qgwyMfrNz1mpMSVua46jh9QYf8N3ME=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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