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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '40491cbf772b9718e3501bd730eecc75665afaf8addbbfb90d877545dc3250a8' 
  AND token = 'Ybxfp+SdTEfwssaP9HkK1z+RpLtiiMA8Xd0o8dL4H9I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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