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SELECT 
  1 
FROM 
  cscart_lock_keys 
WHERE 
  key_id = 'e93af665c722ff1c54be5156a54dfcaa743b7a329b56d55e85802c07d2360474' 
  AND token = 'DqZy+xNUmiDBUHinhcpU2mVlDa+Y438oiDJHlXbRLLY=' 
  AND expiry_at > UNIX_TIMESTAMP(NOW())

Query time 0.00019

JSON explain

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