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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '618c461f5bec29f276b6fb31bde41ffcda9f563d5f3a050dfce3a0ba97e0f128' 
  AND token = '5WxaExE5KKvaw56+LtrWwNJ+eZR0hA/7m6vrvKGGyjA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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