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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = '27a11c13168d3e2e0726e8ae026846c245a25b47a480040e4eaeb8b18ec55f24' 
  AND token = 'zB0DXdakUp1/uptd9m5nHgJg71xlm/lXt3Z1kri2X+E=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00041

JSON explain

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