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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '1f05e6eb9fe4061dd250df2d63be5dae2653e577a7062d2db2f7993a81ced836' 
  AND token = 'KnanKN2dXDPZHv0pgOT4K9sON1GoHx+IG4vyeIc7kFU=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00029

JSON explain

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