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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '9d3c15398565c3eecebb2c326cd7c75843aae84c6d5d93d000f21819587e914c' 
  AND token = 'mGaM3kO1GRCRTZLHd7csiGQS+q6Luk01MUpszQAMV/w=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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