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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '1f80fd00b264b8b8c46817bd48a76ae4c15c5902444f26b4f09e62093debab66' 
  AND token = 'urDaeBL5F+Fdhmanap8tumB/gseqPTV/DlcN3v0o1pY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00021

JSON explain

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