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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '13375d85dec5bdb9d5d5e908a96febcdd033cb693a08690d45204ee0d823a3ee' 
  AND token = 'NDxxqtGYDSWUzmIEjefB0FfH8lme7AT9xnHrm+QNFgE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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