Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '37756c83d28318d1c6446724716cd8f4e436d372eb667d1f2822afe921caa51c' 
  AND token = 'srjCQRKuQN0uKLiHxQqS0xZlHygmbKpn3YCuuow8Pkc=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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