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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '3652342b732f722c9e1086ac1a1bf5163d750ed115be48ea1e869089f2ac7f93' 
  AND token = 'IbuvXZ6wB/T8us+r9CsftBEmfudLrXEXe+F/0H50eGA=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00044

JSON explain

{
  "query_block": {
    "select_id": 1,
    "table": {
      "message": "Impossible WHERE noticed after reading const tables"
    }
  }
}