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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '67948379fab5ad3c064e7e7430fbdbabca4ebc18f08ca18f7dff37e9019f245d' 
  AND token = 'rHUROrNlXYAEc2DEqyzDRCVfffjCSmJDDmHwB2gNU5k=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

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