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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '609dbbaa32f938871d79c1b9162d682ebeaf79301279f1e994701ebadcf133f8' 
  AND token = 'ccP4h+2EV+qjve6EsVj0Poyzu5P8TyvmXIN5Jp2bfug=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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