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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '5de9273f860d2dfe9e2dd97b01c13d7f506b066580dccaf41126165ee5b88327' 
  AND token = 'rYeRoXHsxtvNqtp/YHXZ2/OGaf8m25lXp25GovNGOjM=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00038

JSON explain

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