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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'ad489d4b3af94369ed663ef7e4b2ebb85dd7715f956355da73e1cb227fe513ef' 
  AND token = 'M35J1TKieRx4m2zs8BtVB/VRBN/KmIu2YafTN44FEOo=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00036

JSON explain

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