Sandbox

SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '0e2459276410da7e1edf0f52c3c5ace63821a0243405e3b14f20999ded6e50a2' 
  AND token = 'xOd0ro3P6m2kA0A2d2NEAP4Sjl8yUxw5Tq2vwvZXipo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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