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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '744ce7c4bab1a1b216a4c0d62ca169ebe50beb25427e93d6e1e6046b4eaf82aa' 
  AND token = 'eCYICsebsJCS+hgFTnGN/Q0G44KONhIQrBz8fsjPxPM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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