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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'a5c18e0b530f1c3da416f9b182c00ffd0ef0ce2472dd0795ca76c0b4eab7a3bf' 
  AND token = 'G60fpRvO8szVOOYpv7kROCHPI6+gvo6pEBJx0J8sZj8=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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