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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'f960b146c9e21b47d72fb0f6bf2c55ceb9c0de4b7beeebf240c9e4221160c21b' 
  AND token = 'vbAITOJPwSL/LFQsK5jctbsIn/l7IujSwQl8AVyUy/E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00032

JSON explain

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