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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '698039b0cc9a002889ded362310ffd618cc36e9dc566b2d0d974e5f050b52bdc' 
  AND token = 'OvUZohd3hx/Ulh4Se3hnhnR3Q7gPOXAX9d6W+SJyieo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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