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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '62e616f4e743ddce4640e094dbeee8deb6bee249ad55866b84062280bf8fe8d9' 
  AND token = 'wLjkAT7CNcA7wchxXoIZX9CWmuXa3c+J0Hx6ciHoNPI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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