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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '0dc329d9e809ce8b9a619823aa42b9ba575a89950384a091e1fc329c8c4f8ae8' 
  AND token = 'HMuCgnZtPidABdR2ILt4H24laGI9/i8kLNMggE/8Yes=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00042

JSON explain

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