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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '07772303ddcbe855dce467f323ab70b38c92bf529d973f8e08db5790b2bc0570' 
  AND token = 'EPo8/gND/J8KALgspT55tP6FKyHlxdXnkVr6i3hDTdg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}