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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '153293e9f469bc87886975b1f03363d77d11288c4df1427e29a0f0a2a8ffa95d' 
  AND token = 'Qork6PLASYr+P2MaqzT1J6SIlalk8tJmPWVrjKVMr84=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00030

JSON explain

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