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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '98414ffd4415bd32ea87e2d19cddc4e29f08bfb5ad4ede3d7e903ca1124b5db9' 
  AND token = 'QMsvsfDy+z42IZRiU3pmLmcOBcsTtZPbKGpP5nN4OuQ=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00055

JSON explain

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