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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1bb158668b923d8db12d113b7e9b20343d1a5aaee2d5e68c42213bc97e38a881' 
  AND token = 'hoj7JijJqd99ppwhUMcQWPFFk4c7X/b4G4m3cC/9MTg=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00024

JSON explain

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