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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '33fb691b099a56f48fcce36625864d25234c6d43d8c3e2129284d4a2a557a942' 
  AND token = 'Sx0XF/DYH49EqeYPpJE939fve0wq31ZoPJLJ3zWlU34=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00016

JSON explain

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