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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '8a930dfc2d4ee906db47e3069edc4376524ec288940dd1467e4a92c3cdcfc156' 
  AND token = 'GxM6zPFTQN0ScnwaPUGcd4ICRA4Mn1tv4UG6cZ2bqDA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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