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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '713e93e177b3cc0a8b7ed9f6ea7af8e668af1265715f6746d11afb9d6e00e7e5' 
  AND token = 'Y3Y0I7tesMq25DQrTB7HxC297/B86YdKDPgauBU5GA4=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00026

JSON explain

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