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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ba68de997b038f8b9f1a24454265d212aae4effd7133743a931a8fd48cde19b0' 
  AND token = 'sfhb23yc3A1m7F2NUp7/K4jGXSxzqMEEO8VsON3Bkmg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00031

JSON explain

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