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SELECT 
  1 
FROM 
  cscart_aprillock_keys 
WHERE 
  key_id = '93919b38c487ba1cfb0e041779a3466cfa6d49242a9666bf32405fcf123b7a6c' 
  AND token = 'ds0rK6XWafaR8/wjcDhvIRJGY/Wd8lca6ELhzabVI9w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00028

JSON explain

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