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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = 'ba68528c134020a67f7bb0f94e051ed075d058b4d6af60c8fd1a02ab655f3d4d' 
  AND token = '1UnDx+JocBilBMWa8k7k5BYCwQYo363p1UyZ4PXdeeI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00040

JSON explain

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