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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '2b82fc07a2591965cf77857e2ae0106dfb2e87faa71dab5dee9bb413d248973c' 
  AND token = '7YmfVtJpjsUlHb0MHDYpIiQ4qsG233Rto1yB55V859I=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00039

JSON explain

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