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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1201db8272ea779922d21b860a5e816fef4324fc59b80fc7d0fbc54664e934d0' 
  AND token = 'h+O56aCmDgOe8b6E225Yko18IIXkxExJLT2Z4OJYt08=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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