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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'dae1e9b10bbd14df2f4c3609e36f3e767998118463dbf13b742a7a04f54e872c' 
  AND token = 'lAONzypU+8r0pBbQ+szMBZS2libobBK88Uzm4MwBYRA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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