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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9180728c11e6adfa7c0882a57233b18e729970a7f21edab7e2cb7f6a2c9cfcb3' 
  AND token = 'ma6OgmPh8IHM0pn+97lViHu52YHllWtgfVm+n7vdRgI=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00043

JSON explain

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