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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '04ea9c7f2cc20edfee0e43721936ab91bc534e62123f0e707c9c8cd26ae2db0f' 
  AND token = 'jwbR0mTWDXp1OJykPB8dCZOynPJDBuNWlkUdHW2hi3o=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00037

JSON explain

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