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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '070afa86a4975acd9bd38cf5b5926492eafde6646144db5e1f3713d7df2d9e9d' 
  AND token = 'YKOYhyvnlOc1el1IJHtMVOBw1OgnNcziSsHNBRloKrE=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00046

JSON explain

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